文章摘要
文锋,林程,姜久春,张维戈,王占国.电动汽车用锂离子电池荷电状态定义和估算方法[J].高技术通讯(中文),2012,22(9):975~979
电动汽车用锂离子电池荷电状态定义和估算方法
SOC definition and estimation for EV Li ion batteries
  修订日期:2011-09-27
DOI:
中文关键词: 电动汽车, 荷电状态(SOC), 最大可用容量, 实际可用容量
英文关键词: electric vehicles, state of charge (SOC), maximum available capacity, actual available capacity
基金项目:863计划(2011AA11A223)资助项目
作者单位
文锋 北京理工大学机械与车辆学院 
林程 北京理工大学机械与车辆学院 
姜久春 北京交通大学电气工程学院 
张维戈 北京交通大学电气工程学院 
王占国 北京交通大学电气工程学院 
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中文摘要:
      分析了现有电池荷电状态(SOC)定义方法的主要问题,基于电池的开路电压提出最大可用容量的概念,并对电池的SOC重新进行定义,从而实现了充放电容量与电池工况之间的解耦;通过更新电池的最大可用容量,避免了老化对SOC估算精度的影响;通过将电池的欧姆压降和极化电压折合到放电容量的损失上,得到电池和电池组实际可用容量的计算方法,并验证了其有效性和可行性。
英文摘要:
      The main problems of existing SOC (state of charge) definition methods were analyzed, the concept of maximum available capacity was proposed based on the open circuit voltage (OCV) of a battery, and the battery SOC was redefined, thus the decoupling of a battery’s charge/discharge capacity and work condition was realized. Through updating the maximum available capacity of a battery, the effect of aging on the SOC estimation accuracy was avoided. By converting the internal resistance voltage drop and the polarization voltage into the loss of discharge capacity, a method for calculating the actual available capacity of a battery or a battery pack was achieved, and its validity and feasibility were verified.
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